Depends on the problem you want to solve and product requirements. Often it is better to let the technical person choose. Unless you have tons of money you sho

Depends on the problem you want to solve and product requirements. Often it is better to let the technical person choose. Unless you have tons of money you should avoid niche technologies/frameworks/languages. Solid choices include Ruby, Elixir, Python, Kotlin, Java. On frontend Typescript with React/Angular/Vue. Technology is a secondary choice anyway. Most important is to find great engineers. These would naturally gravitate towards better tools anyway.